nonmember_swap.pass.cpp revision b64f8b07c104c6cc986570ac8ee0ed16a9f23976 
1//===----------------------------------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is dual licensed under the MIT and the University of Illinois Open
6// Source Licenses. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10// <fstream>
11
12// template <class charT, class traits = char_traits<charT> >
13// class basic_filebuf
14
15// template <class charT, class traits>
16// void
17// swap(basic_filebuf<charT, traits>& x, basic_filebuf<charT, traits>& y);
18
19#include <fstream>
20#include <cassert>
21
22int main()
23{
24    {
25        std::filebuf f;
26        assert(f.open("test.dat", std::ios_base::out | std::ios_base::in
27                                                     | std::ios_base::trunc) != 0);
28        assert(f.is_open());
29        assert(f.sputn("123", 3) == 3);
30        f.pubseekoff(1, std::ios_base::beg);
31        assert(f.sgetc() == '2');
32        std::filebuf f2;
33        swap(f2, f);
34        assert(!f.is_open());
35        assert(f2.is_open());
36        assert(f2.sgetc() == '2');
37    }
38    remove("test.dat");
39    {
40        std::wfilebuf f;
41        assert(f.open("test.dat", std::ios_base::out | std::ios_base::in
42                                                     | std::ios_base::trunc) != 0);
43        assert(f.is_open());
44        assert(f.sputn(L"123", 3) == 3);
45        f.pubseekoff(1, std::ios_base::beg);
46        assert(f.sgetc() == L'2');
47        std::wfilebuf f2;
48        swap(f2, f);
49        assert(!f.is_open());
50        assert(f2.is_open());
51        assert(f2.sgetc() == L'2');
52    }
53    remove("test.dat");
54}
55